Vaughn reported the following results from the sale of 5000 units in May: sales $300000, variable costs $215000, fixed costs $60000, and net income $25000. Assume that Vaughn increases its selling price by 5% on June 1. How many units will have to be sold in June to maintain the same level of net income? O 4250. O 4463. O 4750. O 5000.